WO2012071012A2 - Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses - Google Patents

Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses Download PDF

Info

Publication number
WO2012071012A2
WO2012071012A2 PCT/SG2011/000411 SG2011000411W WO2012071012A2 WO 2012071012 A2 WO2012071012 A2 WO 2012071012A2 SG 2011000411 W SG2011000411 W SG 2011000411W WO 2012071012 A2 WO2012071012 A2 WO 2012071012A2
Authority
WO
WIPO (PCT)
Prior art keywords
aryl
alkoxy
cio
alkyl
halo
Prior art date
Application number
PCT/SG2011/000411
Other languages
English (en)
Other versions
WO2012071012A8 (fr
WO2012071012A3 (fr
Inventor
Young-Tae Chang
Seong-Wook Yun
Duanting Zhai
Original Assignee
National University Of Singapore
Agency For Science, Technology And Research
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National University Of Singapore, Agency For Science, Technology And Research filed Critical National University Of Singapore
Priority to EP11843860.5A priority Critical patent/EP2643328B1/fr
Priority to CN201180056146.2A priority patent/CN103298820B/zh
Priority to US13/988,734 priority patent/US8889883B2/en
Priority to SG2013034723A priority patent/SG190173A1/en
Publication of WO2012071012A2 publication Critical patent/WO2012071012A2/fr
Publication of WO2012071012A8 publication Critical patent/WO2012071012A8/fr
Publication of WO2012071012A3 publication Critical patent/WO2012071012A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B57/00—Other synthetic dyes of known constitution
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic System
    • C07F5/02—Boron compounds
    • C07F5/022—Boron compounds without C-boron linkages
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
    • G01N33/582—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances with fluorescent label

Definitions

  • fluorescent small molecules have been developed as reporters and chemosensors for use in biological analyses, which typically are elaborately designed to selectively detect a target substance or conjugated to biomolecules 1 .
  • These fluorescent molecules employ an increase or decrease in their emission intensity in response to the surrounding medium or through specific molecular recognition events. Due to their simplicity and high sensitivity, fluorescent sensors have been widely utilized as popular tools for chemical, biological and medical applications.
  • the most general strategy for fluorescent sensor design is to combine fluorescence dye molecules with designed receptors for specific analytes, expecting that the recognition event between receptor and analyte will lead to a fluorescence property change of the dye moiety.
  • NSC neural stem cells
  • NSC also has great potential for drug screening and efficacy testing significantly reducing the time and efforts needed in drug discovery.
  • the conventional methods for the isolation and characterization of NSC depend on their behavior in a defined culture medium such as neurosphere formation and immunodetection of marker molecules. These methods, however, are time-dependent and involve the use of antibodies which may render the cells unsuitable for further experimental and therapeutic applications. Therefore, a need exists to develop novel chemical compounds that are useful for detection of neural stem cells.
  • This scaffold is compatible with a range of chemical functional groups, and can be bioconjugated to proteins as well as other molecules
  • macromolecules of interest such as carbohydrates and lipids.
  • CDr3 selectively stains both human and mouse neural stem cells (NSC) by binding to a NSC marker protein fatty acid binding protein 7 (FABP7).
  • NSC NSC marker protein fatty acid binding protein 7
  • FIG.1A shows the selective staining of NS5 by CDr3. Nuclei of all El 4, NS5, D-NS5 and MEF were visualized by Hoechst 33342 (DAPI); but only NS5 was selectively stained by CDr3 (TxRd). Top panel, bright field (BF) images;
  • FIG. IB shows the chemical structure of CDr3.
  • FIG. 1C shows the flow cytometry dot plot images of El 4, NS5, D-NS5 and MEF incubated with CDr3. DMSO was added for unstained control cells. The images of each type of cells were overlaid. Segregated NS5 cells by CDr3 are marked.
  • FIG. ID shows selective staining of NS5 by CDr3.
  • PC mixed primary mouse brain cells
  • DAPI fluorescence
  • the images of living cells are shown in bright field (BF) and fluorescence (DAPI and Texas Red) panels.
  • the primary brain cells with various morphologies were not stained by CDr3, while NS5 treated in parallel was stained.
  • the images of the same cells were acquired after immunocytochemical staining (ICC) with antibodies to neuron-specific class III ⁇ -tubulin (Tujl; TxRd channel) and astrocyte- specific glial fibrillary acidic protein (GFAP; FITC channel). Scale bar, 100 um.
  • ICC immunocytochemical staining
  • FIG. 2A shows the identification of CDr3 binding protein.
  • a protein lysate of CDr3-stained NS5 was separated by 2DE.
  • the major fluorescent spot was marked with a circle (left panel).
  • Many silver-stained protein spots were detected in a duplicate gel (right panel).
  • FIG. 2B shows the MS/MS fragment ion analysis of tryptic peptide
  • MWTLTFGDIVAVR SEQ ID No. : 1 , indicated FABP7 as a binding target of CDr3. Only the main y-series of ion fragmentation was labeled in the spectrum. M* indicates oxidation at methionine residue.
  • FIG. 2C shows the fluorescence signals from EGFP and CDr3 overlap only in the cells expressing either mouse FABP7 or human FABP7 fused to EGFP.
  • the fluorescence images were acquired on a Nikon Ti microscope using DAPI
  • FIG. 3 A shows real-time RT-PCR analysis data of FABP7 expression in HI, ReNcell VM and ReNcell VM-differentiated neurons. Relative expression level of FABP7 to GAPDH is depicted.
  • FIG. 3B shows that the strong signal of FABP7 protein (14 kDa) was detected by Western blotting in ReNcell VM (lane 3) lysate, while it was not detectable in the lysates of HI (lane 1) and ReNcell VM-differentiated neurons (lane 2).
  • ⁇ -Actin (42 kDa) staining demonstrates consistent loading across sample lanes. Fluorescence scan showed CDr3 -labelled FABP7 only in the lysate of ReNcell VM (lane 3) incubated with CDr3.
  • FIG. 3C shows the immunocytochemistry of FABP7 in HI, ReNcell VM and ReNcell VM-differentiated neurons (D-ReNcell VM). Only ReNcell VM was brightly stained by FABP7 antibody. Scale bar, 50 um. Upper panel, nuclei staining with DAPI; lower panel, FABP7 staining with antibody.
  • FIG. 3D shows HI, ReNcell VM and ReNcell VM-differentiated neurons incubated with CDr3. Fluorescence signal was detected only in ReNcell VM. Upper panel, bright field image; lower panel, fluorescence image. Scale bar, 50 ⁇ .
  • FIG. 4 A shows differentiated E14 cell distribution in FACS after staining with CDr3.
  • the CDr3-stained embryoid body cells were separated into CDr3 bnght and CDr3 dim populations.
  • FIG. 4B shows the higher expression of FABP7 in CDr3 bright than in CDr3 dim cells, which was determined by immunocytochemistry followed by flow cytometry.
  • the primary FABP7 antibody was detected by an Alexa Fluor 488-conjugated secondary antibody.
  • FIG. 5 shows the higher expression of FABP7, Hesl, Musashi, Nestin and Pax6 in CDr3 bright cells than in CDri ⁇ cells.
  • the CDr3 bright and CDr3 dim cells were collected separately by FACS for gene expression analysis by real time RT-PCR and neurosphere assay.
  • FIG. 6A shows the flow cytometry dot plot images showing shift of stained E14.5 fetal mouse brain cells to bright fluorescence (+) compared to control group (-) ⁇
  • FIG. 6B shows the numbers (left panel) and the sizes (right panel) of neurospheres for the cells sorted by CDr3, CD133 antibody, SSEA-1 antibody and Aldefluor compared to unsorted cells.
  • FIG. 7 shows the numbers (upper panel) and sizes (lower panel) of neurospheres cultured in the presence of CDr3 and DMSO used as a vehicle.
  • FIG. 8 shows number of NS5 cells (left panel) and percentage of
  • BrdU-positive cells (right panel) cultured in the presence of CDr3 and DMSO used as a vehicle.
  • FIG. 9 shows the spectroscopic information of CDr3. DETAILED DESCRIPTION OF THE INVENTION
  • the invention pertains to a novel chemical structure with fluorescence emission and specificity to neural stem cells.
  • This scaffold is compatible with a range of chemical functional groups, and can be bioconjugated to proteins as well as other macromolecules of interest, such as carbohydrates and lipids.
  • One of the compounds named as compound of designation (CDr3), selectively stains both human and mouse neural stem cells (NSC) by binding to a NSC marker protein fatty acid binding protein 7 (FABP7).
  • CDr3 compound of designation
  • NSC NSC marker protein fatty acid binding protein 7
  • One embodiment of the invention is a compound represented by structural Formula (I) or pharmaceutically acceptable salts thereof:
  • R is (C 6 -C 10 )aryl, (C 5 -C 10 )heteroaryl, (C6-C 10 )aryl(C2-C6)alkenyl or 2-4 member polycyclyl, wherein each 2-4 member polycyclyl optionally and
  • R is optionally substituted with 1-4 substituents independently selected from (Ci-C 6 )alkyl, halo(d-C 6 )alkyl, hydroxy(Co-C6)alkyl, (C 6 -Ci 0 )aryl, halo (C 6 -Cio)aryl, hydroxy(C 6 -Ci 0 )aryl, (C 1 -C 6 )alkoxy, halo(Ci-C 6 )alkoxy,
  • Another embodiment of the invention is a method for detection of a neural stem cell (NSC) comprising: a) staining said neural stem cell with a compound, forming a dye-stained neural stem cell by binding said compound to a marker protein of said neural stem cell, wherein said compound is of structural Formula (I) or pharmaceutically acceptable salts thereof:
  • step b) optionally incubating product of step a) to form a said incubated dye-stained stem (intensity of fluorescence can be increased by incubation for the period of time sufficient for achieving desired intensity, e.g., from about 1 hour to about 24 hours, but less or more time may be acceptable.);
  • said method is applied in neural stem cell biology and regenerative medicine.
  • Alkyl means a saturated aliphatic branched or straight-chain monovalent hydrocarbon radical having the specified number of carbon atoms.
  • (Ci-Ce) alkyl means a radical having from 1- 6 carbon atoms in a linear or branched arrangement.
  • (Ci-Ce)alky includes methyl, ethyl, propyl, butyl, pentyl and hexyl.
  • Alkylene means a saturated aliphatic straight-chain divalent hydrocarbon radical having the specified number of carbon atoms.
  • (Ci-C6)alkylene M means a divalent saturated aliphatic radical having from 1- 6 carbon atoms in a linear arrangement.
  • (Ci-C6)alkylene” includes methylene, ethylene, propylene, butylene, pentylene and hexylene.
  • Heterocycle means a saturated or partially unsaturated (4-7 membered) monocyclic heterocyclic ring containing one nitrogen atom and optionally 1 additional heteroatom independently selected from N, O or S. When one heteroatom is S, it can be optionally mono- or di-oxygenated (i.e., -S(O)- or -S(0) 2 -).
  • monocyclic heterocycle include, but not limited to, azetidine, pyrrolidine, piperidine, piperazine, hexahydropyrimidine, tetrahydrofuran, tetrahydropyran, morpholine, thiomorpholine, thiomorpholine 1,1 -dioxide, tetrahydro-2H-l,
  • Cycloalkyl means saturated aliphatic cyclic hydrocarbon ring.
  • C 3 -C 7 cycloalkyl means (3-7 membered) saturated aliphatic cyclic hydrocarbon ring.
  • C 3 -C 7 cycloalkyl includes, but is not limited to cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl.
  • alkoxy means -O-alkyl
  • hydroxyalkyl means alkyl substituted with hydroxy
  • aralkyl means alkyl substituted with an aryl group
  • alkoxyalkyl mean alkyl substituted with an alkoxy group
  • alkylamine means amine substituted with an alkyl group
  • cycloalkylalkyl means alkyl substituted with cycloalkyl
  • dialkylamine means amine substituted with two alkyl groups
  • alkylcarbonyl means -C(0)-A*, wherein A* is alkyl
  • alkoxycarbonyl means -C(0)-OA*, wherein A* is alkyl
  • alkyl is as defined above and includes methoxy, ethoxy, propoxy, butoxy, pentoxy and hexoxy.
  • Cycloalkoxy means an cycloalkyl-O- group wherein the cycloalkyl is as defined above.
  • Exemplary (C 3 -C 7 )cycloalkyloxy groups include cyclopropoxy, cyclobutoxy, cyclopentoxy, cyclohexoxy and cycloheptoxy.
  • Haloalkyl and halocycloalkyl include mono, poly, and perhaloalkyl groups where each halogen is independently selected from fluorine, chlorine, and bromine.
  • Hetero refers to the replacement of at least one carbon atom member in a ring system with at least one heteroatom selected from N, S, and O.
  • a hetero ring system may have 1 or 2 carbon atom members replaced by a heteroatom.
  • Halogen and "halo” are interchangeably used herein and each refers to fluorine, chlorine, bromine, or iodine.
  • Neitro means -N0 2 .
  • an amino group may be a primary (-NH 2 ), secondary
  • haloalkyl and haloalkoxy mean alkyl or alkoxy, as the case may be, substituted with one or more halogen atoms.
  • halogen means F, CI, Br or I.
  • the halogen in a haloalkyl or haloalkoxy is F.
  • acyl group means -C(0)B*, wherein B* is an optionally substituted alkyl group or aryl group (e.g., optionally substituted phenyl).
  • alkylene group is represented by -[CH 2 ] Z -, wherein z is a positive integer, preferably from one to eight, more preferably from one to four.
  • (C6-C 10)aryl used alone or as part of a larger moiety as in
  • arylalkyl means carbocyclic aromatic rings.
  • the term “carbocyclic aromatic group” may be used interchangeably with the terms “aryl”, “aryl ring” “carbocyclic aromatic ring”, “aryl group” and “carbocyclic aromatic group”.
  • An aryl group typically has 6-14 ring atoms.
  • a "substituted aryl group” is substituted at any one or more substitutable ring atom.
  • C6-14 aryl as used herein means a monocyclic, bicyclic or tricyclic carbocyclic ring system containing from 6 to 14 carbon atoms and includes phenyl, naphthyl, anthracenyl, 1,2-dihydronaphthyl, 1,2,3,4-tetrahydronaphthyl, fluorenyl, indanyl, indenyl and the like.
  • heteroaryl refers to aromatic ring groups having five to fourteen ring atoms selected from carbon and at least one (typically 1 - 4, more typically 1 or 2) heteroatoms (e.g., oxygen, nitrogen or sulfur). They include monocyclic rings and polycyclic rings in which a monocyclic heteroaromatic ring is fused to one or more other carbocyclic aromatic or heteroaromatic rings.
  • 5-14 membered heteroaryl as used herein means a monocyclic, bicyclic or tricyclic ring system containing one or two aromatic rings and from 5 to 14 atoms of which, unless otherwise specified, one, two, three, four or five are heteroatoms independently selected from N, NH, N(C 1-6 alkyl), O and S.
  • 2-4 member polycyclyl is a cyclic compound with 2-4
  • hydrocarbon loop or ring structures e.g., benzene rings
  • the term generally includes all polycyclic aromatic compounds, including the polycyclic aromatic hydrocarbons, the heterocyclic aromatic compounds containing sulfur, nitrogen, oxygen, or another non-carbon atoms, and substituted derivatives of these.
  • alkenyl means a straight or branched hydrocarbon radical having a specified number of carbon atoms and includes at least one double bond.
  • the (C6-Cio)aryl(C 2 -C6)alkenyl group connects to the remainder of the molecule through the (C 2 -C6)alkenyl portion of (C6-Cio)aryl(C 2 -C6)alkenyl.
  • Another embodiment of the present invention is a pharmaceutical composition
  • a pharmaceutical composition comprising one or more pharmaceutically acceptable carrier and/or diluent and a compound disclosed herein or a pharmaceutically acceptable salt thereof.
  • “Pharmaceutically acceptable carrier” and “pharmaceutically acceptable diluent” means non-therapeutic components that are of sufficient purity and quality for use in the formulation of a composition of the invention that, when appropriately administered to an animal or human, typically do not produce an adverse reaction, and that are used as a vehicle for a drug substance (i.e. a compound of the present invention).
  • compositions of the present invention are also included.
  • an acid salt of a compound of the present invention containing an amine or other basic group can be obtained by reacting the compound with a suitable organic or inorganic acid, resulting in pharmaceutically acceptable anionic salt forms.
  • anionic salts include the acetate, benzenesulfonate, benzoate, bicarbonate, bitartrate, bromide, calcium edetate, camsylate, carbonate, chloride, citrate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, glyceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate,
  • Salts of the compounds of the present invention containing a carboxylic acid or other acidic functional group can be prepared by reacting with a suitable base.
  • a suitable base such as a pharmaceutically acceptable salt may be made with a base which affords a pharmaceutically acceptable cation, which includes alkali metal salts (especially sodium and potassium), alkaline earth metal salts (especially calcium and magnesium), aluminum salts and ammonium salts, as well as salts made from physiologically acceptable organic bases such as trimethylamine, triethylamine, morpholine, pyridine, piperidine, picoline, dicyclohexylamine, N,
  • N'-dibenz lethylenediamine 2-hydroxyethylamine, bis-(2-hydroxyethyl)amine, tri-(2-hydroxyethyl)amine, procaine, dibenzylpiperidine, dehydroabietylamine, ⁇ , ⁇ '-bisdehydroabietylamine, glucamine, N-methylglucamine, coUidine, quinine, quinoline, and basic amino acids such as lysine and arginine.
  • BODIPY 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene
  • BODIPY scaffold modification for BODIPY scaffold has been well explored. Thus great numbers of BODIPY dyes have been used to label biomolecules. A large numbers of sensors and markers based on BODIPY scaffold have also been developed. But
  • FABP7 Matrix-assisted laser desorption/ionization-time of flight/time of flight mass spectrometry (MALDI-TOF/TOF MS) and MS/MS analysis allowed us to identify the protein spot as FABP7 (FIG. 2B).
  • FABP7 is particularly expressed in the central nervous system and a well- known marker of radial glial cells which play as NSC in the brain 6 .
  • CDr3 we cloned both human and mouse FABP7 genes and fused them to EGFP constructs for expression in HEK293 cells. We incubated the cells with CDr3 and observed the signals of EGFP and CDr3 overlap in the cells that express either human or mouse FABP7 fused to EGFP (FIG. 2C).
  • ReNcell VM were strongly stained by FABP7 antibody while HI and ReNcell VM-derived neurons were not stained (FIG. 3C).
  • CDr3 selectively stained ReNcell VM in living cell cultures (FIG. 3D).
  • FABP7-positive radial glial cells The embryoid bodies generated from El 4 in the absence of leukemia inhibitory factor were treated with retinoic acid for 2 days until dissociation into single cell suspension. The cells were stained with CDr3 and the CDr3bright and CDr3dim cells were collected separately by FACS. Each cell population was stained with FABP7 antibody and analyzed by flow cytometry. The overlay plot showed well-separated 2 clusters demonstrating that the cells isolated by CDr3 from the heterogeneous embryoid body cells were FABP7 expressing cells (FIG. 4).
  • CDr3 dim cells generated only 0.25 ⁇ 0.5 neurospheres per well.
  • FACS FACS for neurosphere assay
  • E14 was maintained on gelatin-coated dishes in high-glucose DMEM supplemented with 10% FBS, 2 mM L-glutamine, 100 U/ml penicillin, 100 g/ml streptomycin, 0.1 mM non-essential amino acids, 0.1% ⁇ -mercaptoethanol and 100 U/ml leukemia inhibitory factor (LIF, Chemicon).
  • LIF leukemia inhibitory factor
  • EBF media 90% of the EBF media was changed on a daily basis for a total of 4 days and then retinoic acid (Sigma) was added to the final concentration of 1 ⁇ .
  • retinoic acid Sigma
  • the embryoid bodies were harvested and dissociated in 0.05% trypsin with 0.2 mM EDTA solution for 3 min at 37°C to obtain a single cell suspension.
  • NS5 was maintained in Euromed-N medium supplemented with 100 ⁇ g/ml Apo-transferin (Sigma), 5.2 ng/ml Sodium Selenite (Sigma), 19.8 ng/ml progesterone (Sigma), 16 ⁇ g/ml Putrescine (Sigma), 25 ⁇ g/ml insulin (Sigma), 50.25 ⁇ g/ml BSA (Gibco), 10 ng/ml bFGF (Gibco), 10 ng/ml EGF (Gibco), 100 U/ml penicillin (Gibco), 100 ⁇ g/ml streptomycin (Gibco) and 2 mM L-glutamine (Gibco).
  • NS5 maintenance medium containing 5% FBS but without FGF and bEGF.
  • MEF was maintained in the same media as used for El 4 but without LIF.
  • HI was maintained in a feeder-free condition on matrigel-coated dishes in
  • MEF-conditioned medium containing Knockout DMEM/ 10% serum replacement (Gibco), 0.1 mM MEM non-essential amino acids (Gibco), 1 mM L-glutamine (Gibco), 0.1 mM ⁇ -mercaptoethanol (Gibco), 8% plasmanate (NUH pharmacy), 12 ng/ml LIF, and 10 ng/ml human recombinant Basic Fibroblast Growth Factor (bFGF; Gibco).
  • ReNcell VM (Millipore #SCC008) was maintained on laminin- coated dishes in ReNcell NSC Maintenance Medium (Millipore #SCM005) containing 20 ng/ml bFGF and 20 ng/m EGF.
  • ReNcell VM were seeded on PLO/Laminin-coated plates and cultured for up to 3 weeks in media comprising a 1:1 mix of N2-DMEM/F12 and B27-Neurobasal media supplemented with O.lmM MEM non-essential amino acids and 1 mM L-glutamine, all obtained from Gibco/Invitrogen.
  • media comprising a 1:1 mix of N2-DMEM/F12 and B27-Neurobasal media supplemented with O.lmM MEM non-essential amino acids and 1 mM L-glutamine, all obtained from Gibco/Invitrogen.
  • mixed primary brain cell culture the brains of neonatal mouse pups were cut into small pieces and digested in 0.25% trypsin with ImM EDTA solution (Invitrogen) for 30 min at 37°C before neutralization with FBS.
  • the tissues were triturated using a 10 ml pipette fitted with 1 ml tip and the suspension was filtered through a strainer with 40 um nylon mesh.
  • the obtained single cells were plated on 35 mm cell culture dishes in OptiMEM- GlutaMAXTM containing 10% FBS.
  • Unattached cells and cell debris were removed the next day by replacing medium. One-half of the medium was replaced twice a week thereafter.
  • DOFL compounds were diluted from 1 mM DMSO stock solutions with the culture medium to make final concentration of 0.5 ⁇ or 1.0 ⁇ .
  • the 4 different types of cells plated side by side on 384- well plates were incubated with the compounds overnight at 37 °C and the nuclei were stained with either Hoechst33342 or DRAQ5 the next day before image acquisition.
  • the fluorescence cell images of 2 regions per well were acquired using ImageXpress MicroTM cellular imaging system (Molecular Device) with 10X objective lens and the intensity was analyzed by MetaXpress® image processing software (Molecular Device).
  • the hit compounds which stained NS5 more brightly than other cells were selected based on the intensity data and manual screening of the raw images.
  • the cells were incubated with 0.5 ⁇ of CDr3 in Opti-MEM GlutaMAXTM for 1 hr and, if necessary, subsequently with 2 ⁇ of Hoechst 33342 for 15 min at 37°C. Then the cells were rinsed in the maintenance medium for 1 hr and the medium was replaced again with fresh one before image acquisition. The staining and destaining times were prolonged when necessary.
  • the bright field and fluorescence images were acquired on ECLIPSE Ti microscope (Nikon Instruments Inc) or AIR confocal microscope (Nikon Instruments Inc) using NIS Elements 3.10 software or on Axio Observer Dl using Axio Vision v 4.8 software (Carl Zeiss Inc).
  • the cells incubated with CDr3 were harvested by trypsin treatment, washed and resuspended in PBS.
  • the fluorescence intensity of the cells was measured on a flow cytometry (BDTM LSR II) or collected using a FACS machine (BD FACS AriaTM).
  • the data were analyzed and processed using Flow Jo 7 software.
  • CDr3-stained NS5 pellet was lysed in a lysis buffer (40mM Trizma, 7M Urea, 2M thiourea and 4% CHAPS) premixed with 10 ⁇ /ml Protease Inhibitor Cocktail (EDTA free, GE healthcare), 50 ⁇ gml DNase I and 50 ⁇ g/ml RNase A (Roche).
  • the proteins of 0.2 mg and 1 mg were separated by 2DE for silver staining and fluorescent imaging, respectively.
  • the fluorescence image of gels was acquired using a Typhoon 9400 scanner (GE healthcares) at excitation/emission wavelengths of 532nm/610nm with PMT at 500v and a duplicate gel was stained using
  • Tryptic peptide of 0.6 ⁇ was spotted onto Prespotted AnchorChip target plate (Bruker Daltonics Inc) according to manufacturer's protocol.
  • the peptide mass fingerprint and selected peptide MS/MS fragment ion analysis were carried out on UltraFlex III TOF-TOF (Bruker Daltonics Inc) with the compass 1.2 software package including FlexControl 3.0 and FlexAnalysis 3.0 with PAC peptide calibration standards.
  • CDr3 1, (20 mg, 0.047 mM) and 3,4-dimethoxybenzaldehyde (16 mg, 0.094 mM) were dissolved in acetonitrile (4 ml), followed by the addition of the mixture of pyrrolidine (23.6 ⁇ , 0.282 mM) and acetic acid (16.1 ⁇ , 0.282 mM). The reaction was heated at 85oC for 15 min and then cooled down to r.t. The resulting crude mixture was concentrated under vacuum and purified by normal- phase column chromatography (eluting system: hexane/ethyl acetate (6:1) to render CDr3 as purple solid (15 mg, 56% yield).
  • E14.5 fetal mouse brains were trypsinized in 0.25% trypsin with ImM
  • EDTA solution (Invitrogen) for 30 mins at 37°C before neutralization with FBS.
  • the tissues were triturated sequentially with a 10ml pipette followed by a 1 ml blue tip and a 0.2 ml yellow tip attached to the 10 ml pipette until the cell suspension flows through smoothly.
  • the tissue suspension was washed 3 times with PBS by repeated resuspension and centrifugation and filtered through a 40 um strainer.
  • the cells were stained using CDr3, CD133 antibody, SSEA-1 antibody or Aldefluor as described below and FACS sorted.
  • the FACS sorted bright and dim cells of 2% at each end and unsorted (randomly harvested) cells were plated in a DMEM/F12 medium containing 10 ng/ml bFGF, 20 ng/ml EGF and B27 without vitamin A (Invitrogen) at a density of 10,000 cells/well in 6- well plate to grow forming spheres.
  • the number and size of neurospheres generated from each group were measured after 6 days culture.
  • Dissociated cells were incubated with 0.5 ⁇ of CDr3 in neurosphere media for 1 hr and then spun down for resuspension in compound free neuropshere media for 30 minutes. The cells were then spun down and resuspended in PBS for FACS. For control group, the cells were incubated with 0.05% DMSO instead of CDr3.
  • Dissociated cells were blocked in 1% BSA for 30 min and then incubated with CD133 antibody (1 :500) for 1 hr.
  • the cells were washed with PBS by centrifugation and resuspension and then incubated with Alexa fluor 488-conjugated anti-rat IgG (1:1 ,000) for 1 hr.
  • the stained cell sample was washed again before resuspension in PBS for FACS. For control group, primary antibody was omitted.
  • Dissociated cells were blocked in 1% BSA for 30 min and then incubated with SSEA-1 antibody (1 :500) for 1 hr.
  • the cells were washed with PBS by centrifugation and resuspension and then incubated with Alexa fluor 633 -conjugated anti-mouse IgM (Invitrogen) for 1 hr.
  • the stained cell sample was washed again before resuspension in PBS for FACS. For control group, primary antibody was omitted.
  • the cells were incubated with activated Aldefluor substrate (5 ⁇ 1/ ⁇ 1) for 30 min at 37°C. The cells were then spun down and resuspended in Aldefluore assay buffer for FACS. For control, diethylaminobenzaldehyde, a specific inhibitor of ALDH was added (5 ⁇ 1/ ⁇ 1) to the cells together with Aldefluore substrate.
  • Neurospheres were generated from the fetal mouse brain cells prepared as described in above (Neural stem cell isolation). After expansion by 2 times of passages, the cells plated in triplicate in 6-well culture plates at a density of 3,000 cells per well and cultured in the presence of 1 ⁇ CDr3 or 0.1% DMSO for 6 days. After 6 days, the numbers and sizes of neurospheres were determined. For serial assay, the neurospheres were further passaged in the medium containing 1 ⁇ CDr3 or 0.1% DMSO. NS5 cell proliferation assay
  • NS5 were seeded into 96-well plates (Greiner) at a density of 1000 cells/well. The next day, DMSO and 1 mM DMSO stock of CDr3 was added into 32 wells for each to be diluted to 0.1% and 1 uM, respectively. At 6 hr and 48 hr time points, lug/ml of Hoechst 33342 was added and incubated for 15 min for image acquisition using an ImageXpress MicroTM and MetaXpress Imaging system
  • Hoeschst33342 and CDr3 signals were detected via DAPI and Texas red filters, respectively, and the images of a total of 4 areas were captured per well. Multi wavelength scoring analysis was then run to quantify the number of cells based on Hoechst 33342-stained nuclei image.
  • the cells were stained using FITC conjugated anti-BrdU antibody (BD PharmingenTM) according to the manufacturer's instruction. Total numbers of Hoechst 33342-stained and BrdU-labeled nuclei were counted by image based analysis using ImageJ-ITCN software.

Abstract

La présente invention concerne un composé de fluorescence représenté par la formule structurelle (I) dotée d'une spécificité pour les cellules souches nerveuses : I ou un sel pharmaceutiquement acceptable de celui-ci. Les variables de la formule structurelle (I) sont définies dans le présent document. Des procédés de détection de cellules souches nerveuses, comprenant l'utilisation d'un composé de formule structurelle (I) ou de ses sels pharmaceutiquement acceptables sont également décrits. Les composés présentant la formule structurelle (I) sont en mesure de détecter et de séparer des cellules souches nerveuses sans immunocoloration, résultant ainsi en un procédé nettement plus court et pratique de détection de cellules souches nerveuses.
PCT/SG2011/000411 2010-11-24 2011-11-22 Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses WO2012071012A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11843860.5A EP2643328B1 (fr) 2010-11-24 2011-11-22 Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses
CN201180056146.2A CN103298820B (zh) 2010-11-24 2011-11-22 用作神经干细胞探针的氟硼二吡咯结构荧光染料
US13/988,734 US8889883B2 (en) 2010-11-24 2011-11-22 BODIPY structure fluorescence dye for neural stem cell probe
SG2013034723A SG190173A1 (en) 2010-11-24 2011-11-22 Bodipy structure fluorescence dye for neural stem cell probe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41680810P 2010-11-24 2010-11-24
US61/416,808 2010-11-24

Publications (3)

Publication Number Publication Date
WO2012071012A2 true WO2012071012A2 (fr) 2012-05-31
WO2012071012A8 WO2012071012A8 (fr) 2012-10-26
WO2012071012A3 WO2012071012A3 (fr) 2012-12-13

Family

ID=46146344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2011/000411 WO2012071012A2 (fr) 2010-11-24 2011-11-22 Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses

Country Status (5)

Country Link
US (1) US8889883B2 (fr)
EP (1) EP2643328B1 (fr)
CN (1) CN103298820B (fr)
SG (1) SG190173A1 (fr)
WO (1) WO2012071012A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735667A (zh) * 2012-06-28 2012-10-17 南京大学 基于氟硼二吡咯-苯硼酸的荧光传感膜及其制备方法和应用
WO2014013205A1 (fr) * 2012-07-19 2014-01-23 Centre National De La Recherche Scientifique Composés fluorescents de type thiényldipyrrométhène borés et leurs utilisations
CN103755753A (zh) * 2014-01-25 2014-04-30 福州大学 一类糖基化氟硼二吡咯衍生物及其制备和应用
WO2014104975A1 (fr) * 2012-12-26 2014-07-03 National University Of Singapore Composés amino-triazolyl-bodipy à mégadéplacement de stokes et applications de coloration de neurones vivants et sondage de sites médicamenteux d'acide gras 1 d'albumine sérique humaine
WO2014109713A1 (fr) * 2013-01-14 2014-07-17 National Univeristy Of Singapore Sonde fluorescente de cycle cellulaire possédant une spécificité de phase m
WO2016171619A1 (fr) * 2015-04-24 2016-10-27 Nanyang Technological University Sondes fluorescentes chimiques servant à la détection de biofilms
WO2017139689A1 (fr) * 2016-02-12 2017-08-17 Oregon Health & Science University Dérivés de bodipy
WO2019009810A1 (fr) * 2017-07-04 2019-01-10 Agency For Science, Technology And Research Composés fluorescents spécifiques de cellules souches pluripotentes et cellules prêtes à la reprogrammation et leurs procédés d'utilisation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016073385A1 (fr) * 2014-11-03 2016-05-12 Agency For Science, Technology And Research Composés pour le diagnostic ou le traitement de troubles associés à des oligomères protéiques ou peptidiques
CN110669350B (zh) * 2019-11-04 2022-02-08 南京林业大学 一种哌啶基bodipy类红光荧光染料及其制备方法和应用

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2353701C (fr) 1998-12-07 2014-06-03 Duke University Methode de detection de la presence de cellules souches au moyen d'un substrat detectable pour l'aldehyde dehydrogenase (aldh)
US7070944B2 (en) 2001-03-14 2006-07-04 Clf Medical Technology Acceleration Program, Inc. System for screening fatty acid transport inhibitors, methods of use and modulators identified thereby
ATE447178T1 (de) * 2001-07-02 2009-11-15 Arctic Diagnostics Oy Zwei photonen absorbierende bordipyrromethen- difluorid-farbstoffe und ihre anwendungen
US8574590B2 (en) 2003-07-30 2013-11-05 Integral Molecular, Inc. Lipoparticles comprising proteins, methods of making, and using the same
ATE476659T1 (de) 2004-06-09 2010-08-15 Becton Dickinson Co Sensor für mehrere analyte
US20060040327A1 (en) 2004-08-18 2006-02-23 Terry Amiss Methods of screening proteins
CA2613290A1 (fr) 2005-05-27 2007-05-24 Aurelium Biopharma Inc. Micromatrice d'adn focalisee et procedes de diagnostic de resistance aux medicaments chimiotherapeutiques dans une cellule cancereuse
US20070111196A1 (en) 2005-08-19 2007-05-17 Javier Alarcon Sterilization of Biosensors
WO2008046072A2 (fr) 2006-10-13 2008-04-17 The Board Of Regents Of The University Of Texas System Inducteurs chimiques de la neurogénèse
CN101271108A (zh) * 2008-01-11 2008-09-24 广州益善生物技术有限公司 心肌梗塞早期诊断液相芯片及其制备方法
US9453204B2 (en) 2008-07-14 2016-09-27 Oklahoma Medical Research Foundation Production of pluripotent cells through inhibition of bright/ARID3a function
WO2010035136A2 (fr) 2008-09-25 2010-04-01 Uti Limited Partnership Propagation de cellules souches embryonnaires
CN101565554B (zh) * 2009-05-24 2013-06-05 大连理工大学 一类含有咔唑结构的强荧光氟硼二吡咯染料

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of EP2643328A4 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735667A (zh) * 2012-06-28 2012-10-17 南京大学 基于氟硼二吡咯-苯硼酸的荧光传感膜及其制备方法和应用
WO2014013205A1 (fr) * 2012-07-19 2014-01-23 Centre National De La Recherche Scientifique Composés fluorescents de type thiényldipyrrométhène borés et leurs utilisations
FR2993565A1 (fr) * 2012-07-19 2014-01-24 Centre Nat Rech Scient Composes fluorescents de type thienyldipyrromethene bores et leurs utilisations.
EP3418283A1 (fr) * 2012-07-19 2018-12-26 Centre National De La Recherche Scientifique Composés fluorescents de type thiényldipyrrométhène borés et leurs utilisations
US9513294B2 (en) 2012-12-26 2016-12-06 National University Of Singapore Megastokes amino-triazolyl-BODIPY compounds and applications to live neuron staining and human serum albumin FA1 drug site probing
WO2014104975A1 (fr) * 2012-12-26 2014-07-03 National University Of Singapore Composés amino-triazolyl-bodipy à mégadéplacement de stokes et applications de coloration de neurones vivants et sondage de sites médicamenteux d'acide gras 1 d'albumine sérique humaine
CN105102464B (zh) * 2012-12-26 2017-03-29 新加坡国立大学 梅咖斯托克斯氨基‑三唑基‑bodipy化合物及用于活神经元染色和人血清白蛋白fa1药物位点探测的应用
KR20150098639A (ko) * 2012-12-26 2015-08-28 내셔널 유니버시티 오브 싱가포르 메가스토크스 아미노-트리아졸릴-bodipy 화합물 및 살아있는 뉴런 염색 및 인간 혈청 알부민 fa1 약물 부위 프로빙에 대한 적용
CN105102464A (zh) * 2012-12-26 2015-11-25 新加坡国立大学 梅咖斯托克斯氨基-三唑基-bodipy化合物及用于活神经元染色和人血清白蛋白fa1药物位点探测的应用
JP2016511746A (ja) * 2012-12-26 2016-04-21 ナショナル ユニバーシティ オブ シンガポール ストークスシフトが大きいアミノ−トリアゾリル−ボディパイ化合物ならびに生ニューロン染色およびヒト血清アルブミンｆａ１薬剤部位プロービングへの応用
KR101715543B1 (ko) 2012-12-26 2017-03-10 내셔널 유니버시티 오브 싱가포르 메가스토크스 아미노-트리아졸릴-bodipy 화합물 및 살아있는 뉴런 염색 및 인간 혈청 알부민 fa1 약물 부위 프로빙에 대한 적용
US9423395B2 (en) 2013-01-14 2016-08-23 National University Of Singapore Fluorescent cell cycle probe having M-phase specificity
WO2014109713A1 (fr) * 2013-01-14 2014-07-17 National Univeristy Of Singapore Sonde fluorescente de cycle cellulaire possédant une spécificité de phase m
CN103755753B (zh) * 2014-01-25 2016-05-04 福州大学 一类糖基化氟硼二吡咯衍生物及其制备和应用
CN103755753A (zh) * 2014-01-25 2014-04-30 福州大学 一类糖基化氟硼二吡咯衍生物及其制备和应用
WO2016171619A1 (fr) * 2015-04-24 2016-10-27 Nanyang Technological University Sondes fluorescentes chimiques servant à la détection de biofilms
US10416153B2 (en) 2015-04-24 2019-09-17 Nanyang Technological University Chemical fluorescent probes for detecting biofilms
WO2017139689A1 (fr) * 2016-02-12 2017-08-17 Oregon Health & Science University Dérivés de bodipy
US9751897B1 (en) 2016-02-12 2017-09-05 Oregon Health & Science University Derivatives of Bodipy
WO2019009810A1 (fr) * 2017-07-04 2019-01-10 Agency For Science, Technology And Research Composés fluorescents spécifiques de cellules souches pluripotentes et cellules prêtes à la reprogrammation et leurs procédés d'utilisation
US11634437B2 (en) 2017-07-04 2023-04-25 Agency For Science, Technology And Research Fluorescent compounds specific for pluripotent stem cells and reprogramming-ready cells and methods of using the same

Also Published As

Publication number Publication date
EP2643328A4 (fr) 2014-07-23
CN103298820A (zh) 2013-09-11
WO2012071012A8 (fr) 2012-10-26
CN103298820B (zh) 2016-08-03
WO2012071012A3 (fr) 2012-12-13
EP2643328A2 (fr) 2013-10-02
US8889883B2 (en) 2014-11-18
EP2643328B1 (fr) 2015-07-01
SG190173A1 (en) 2013-07-31
US20130244251A1 (en) 2013-09-19

Similar Documents

Publication Publication Date Title
EP2643328B1 (fr) Colorant de fluorescence à structure bodipy pour une sonde de cellules souches nerveuses
AU2021266230B2 (en) Ultra bright dimeric or polymeric dyes with spacing linker groups
US10865310B2 (en) Ultra bright dimeric or polymeric dyes
US11874280B2 (en) Use of divalent metals for enhancement of fluorescent signals
US11175204B1 (en) 7-hydroxycoumarin-based cell-tracking reagents
CN103502218A (zh) 用于缀合生物分子的化合物和方法
JP6262848B2 (ja) 薬物標的の捕獲方法
US9513294B2 (en) Megastokes amino-triazolyl-BODIPY compounds and applications to live neuron staining and human serum albumin FA1 drug site probing
US10077463B2 (en) Optical selection of cells
WO2013095305A1 (fr) Sondes de fluorescence à structure bodipy destinées à diverses applications biologiques
US9423395B2 (en) Fluorescent cell cycle probe having M-phase specificity
CA2932844A1 (fr) Composes formant des excimeres
Fernando et al. Differentiation of cortical brain organoids and optic nerve-like structures from retinal confluent cultures of pluripotent stem cells
WO2023190745A1 (fr) Marqueur d'épithélium conjonctival et son utilisation
US20110092534A1 (en) Ammosamides as Anticancer Agents
TWI820104B (zh) 雜環化合物
EP2912029A1 (fr) Colorant chimique fluorescent pour visualisation de division symétrique et asymétrique de cellules souches neuronales
Peter et al. Limitations of fluorescent timer proteins toward isolation of developmentally and transcriptionally synchronized populations of human pluripotent stem cells and neural progenitors highlight unique expression and fluorescence maturation kinetics by human cells
YONEDA Study on the Mode of Action of Marine Natural Product Aplyronine A by Using Novel Chemical Probes

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11843860

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 13988734

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2011843860

Country of ref document: EP